Cloth-cutting machine



Feb. 13, 1923. 1,445,325 A. KIRN.

CLOTH CUTTING MACHINE.

FILED JUNE 17' 1919 3 SHEETS-SHEET lsnow x 501 Aggwifi wj $5 Feb. 13, 1923.

A. KIRN. CLOTH CUTTING MACHINE.

FILED JUNE 17, 1919.

Feb. 13, 1923.

1,445,325. A. KIRN.

CLOTH CUTTING MACHINE.

FILED JUNE 1?. 1919.

3 SHEETSSHEET 3- GHMMM Patented Feb. 13, 1923.

T hi

AUGUST KIRN, OF CINCINNATI, OHIO.

CLOTH-CUTTING MACHINE.

Application filed June 17, 1919. seriallqo. 304,841.

T 0 all whom it may concern:

Be it known that A GUST KIRN, a citizen of the United States, residing at Cincinnati. in the county of Hamilton and Stateof Ohio, has invented new and useful Improvements in a Cloth-OuttingMachinc, of which the following'is a specification.

The object of theinvention is to provide a machine for cutting cloth in b ill-zthat is, for cutting a multiplicity of layers of cloth at one operation. To this end the invention comprises a suitable basemounted on axes or rolls. over a cutting table. 011 this base there is mounted a column in which there is housed a plurality of cutting knives assembled in the form of a chain and driven by anfacceptableprime mover. The chain of knives travel down the column on one side and up on the other. The section traveling downward projects from the side of the column so that their cutting edges may engage the cloth to be" severed, while the section of knives. traveling upward ride in a suitable guide within the column. The pro: vision. of a chainilike cutting device makes for the ready removal or replacement of any ofitsdamaged elements.

In addition to the cutting knives them; selves, the device is provided with an effec tive sharpening medium by means of whicli a keen edge is kept on the cutting knives.

A further object of the invention is to provide a cuttingmachine of the character n entioned whichis simple in construction, durable and efiective in operation and inexpensive to manufacture.

Other andfurther objects appear in the following description wherein the. invention is set forth in detail.

To the exact construction in which itis shown and described, the invention is not to be restricted The right is reserved to make such changes "or alterations as] the actual reduction to practice may suggest, in

so far as such changes. or alterations are compatible in spir t with the annexed claims.

In the accompanying drawings wherein like numerals of reference designate like parts,

Fig. 1 is a view in side elevation of the improved machine.

Fig. 2 is a bottom plan view of the structurein Fig. 1.

Fig. 3 is a side elevational view similar to Fig. 1, but looking in a direction at right angles to the direction from WhlClLFlg. 1 is viewed.

Fig. 4: is a section on the line l-4C of Flg. 1.

Fig. 5 is a section on the line 5-5 of 6 is a section on the line 6-6 of Fig.

Fig. 7 is a perspective view of one of the 6,5

Referring to the drawings the invention 7 5 is shown as comprising a base 1 which is preferably circular in shape, this base carrying the four rolls 2 which are rotatably mounted on appropriate studs or pins The rolls provide for the free movement of the basc'over a cutting table or other surface whereon the device is used for the cutting of cloth.

Upstanding from the base at the center thereof there is a hollow column 4: which is substantially elliptical in cross section, the minor diameter being much shorter than the major diameter. This column 4 carries at] its upper end a motor casing 5 so dlsposed with reference to the column that the driv- 9o ing shaft of the motor parallels theminor diameter thereof. At the other end ofthe motor casing there is provided an appropriate handle 6' through wh ch a supply tor shaft, this bar 9 at the upper end. being a opposite from the remainder of the bar, as indicated at 11, so that the sprocket 12 which is carried by the motor shaft 11 may be disposed directly above the main portion ofthe bar to permit the chain like cutting element of the device to move in substanti ally the same of the bar. V

A stud 13 is supported in the base 1 for the purpose of carrying a sprocket wheel 14 identical with the sprocket wheel 12. p This stud '13 is clamped into position in the base by means of a block 15 through. which atplane with the main portion taching screws 16 pass and thread into the base, this block being set between the strengthening ribs 17 of the base. The bar 9 adjacent the base, is offset, as indicated at 18, so that the sprocket :14- which the stud 13 carries may align with the sprocket 12.

Traveling over the two sprockets there is the chain like cutting element which is driven by the motor 5 through the latters turning of the sprocket 12. This chain like cutting element consists of a plurality of knives 19madesubstantially rectangular in a plane and formed on one edge with two spaced ears 20 and on the edge opposite these cars the knife is beveled, as indicated at 21, to provide a cutting edge.v The upper edge ofthe knife 19 is formed square with the two faces of the knife, but the bottom edge is. beveled just as is done at 21. to leave a bottom cutting edge 22, the two cutting edges being blended by the curving of thecorner between the two as indicated at 23. The several knives 19 are grouped together inthe form of a chain by means of links 24- which in shape simulate that edge of the knives whereon the cars 20 are formed. In connecting adjacent knives together toolings are employed and disposed on either side of the knives, pins 25 passing through the links and through the ears in the knives. By means of this construction the inner edge of. the chain like cutting element s made to simulate a roller chain and this cutting element is supported by the sprockets l2 and 14:, the former having the driving sprocket and the latter the idler.

The hollow column 4 at one edge is slotted 1n the direction'ofits length as indicated at 26 and the downwardly moving portion of The cutting edges themselves do not engage any part of the slot 28 but the side walls of the said slot will abut the side faces of the knives onany tendency to lateral moveof a rod or bar 30 which is adjustably sup.

ported in a bracket 31 carried by the motor casing. The sharpener 29 is formed with the bifurcated end 32 which straddlesthej cutting edges of the knives and its shaft to conform to the angle ofthe bevel of the cutting edges, so that the two legs of the bifur cated end may engage the knives on opposite sides of the cutting edge to grind the knives to effect the sharpening of the latter. The sharpener 29 is adjustable vertically because of the adjustment of, the rod provided in the bracket.or'supportBl. If the number of layers of cloth-being cut makes a thick or high pile the-sharpener can be ad: justed to a position where the knives pass directly into the cloth after leaving the sharpener. On a low pile composed of a comparatively few layers of cloth the sharp ener can be lowered to attain the same relative position. to the character of pile that it may have with reference to a thick pile.

In the use of the -i nachine, the clothto be cut is laid in layers on the cutting table. The base is set under the lowermost layer and when the motor 5 is started by means of the switch 8, the chain like cutting element composed of theknives 19, is set in motion, those knives eifecting the cutting operation coming down the table as the motor revolves. The movement of the column through the cloth following the outline of the pattern to be cut is then effected by pressure exerted: upon the handle and if need be. on the column, the roller upon column, a bracket mounted at the upper end of the column, and a sharpener adjustably mounted in the bracket and consisting of a bar slidably engaging the bracket and a bifurcate carried at the lower end of the bar and straddling the chain like cutting element for engagement with the cutting edges of the same.

In testimony whereof he affixes his signa- 20 ture.

AUGUST KIRN. 

